DC Power Supplies from 5KW to 15MW

Solid State High Power DC Power Supplies

PCTI's high power DC power supplies are a solid state unit utilizing primary SCR (thyristor) technology in a full-bridge rectifier, constant voltage control, constant current control, automatic crossover series regulation, DC filter, instrumentation, and many operational and protective monitoring features. We manufacture military DC power supplies, industrial DC power supplies, rugged high power rectifiers, and custom DC power supplies in the highest power ranges. PCTI's High-Precision class of DC power supplies use an SCR preregulator to achieve high efficiency, low ripple, precise regulation and low output noise. Power supply designs are available in ratings from 5KW to 15MW with current ratings up to 120KVA.

For Your Application

PCTI's high power DC power supplies and systems can be used wherever DC power is required. Our rugged high power rectifiers are at work today in hundreds of industrial, commercial, research, transit and military applications including electrochemical, steel, welding, plating, circuit breaker testing, busbar testing, desalinization, grid tie in, and aircraft engine starting. Each unit is based on standard designs and precision engineered to meet your specific application. Our custom DC power supplies are available as regulated or non-regulated for a variety of industrial or laboratory environments. If you need help in specifying your power supply, request a quote online or download our dc power supply brochure.

Custom DC Power Supplies Designed for You

PCTI's high power DC power supplies are built to customer order from a range of standard power and control modules, and offer high performance, high reliability and sophisticated control systems. A variety of computer interfaces are available to meet all of your power supply programming and control requirements. Applications can include any low voltage power supplies, high current DC power supplies, industrial power supplies or military power supplies.

Standard Specifications

The following specifications outline PCTI's high power DC power supplies. Please contact PCTI for options not listed here or for assistance regarding your particular application.


•  Voltage: +10%
 •  Single phase: 110, 115, 120, 130, 200, 208, 230
 •  Three phase: 208, 220, 230, 380, 415, 440, 460, 480, 575
•  Frequency: 50/60Hz
•  Power factor: better than 0.9 lagging from 10% to full load


•  Voltage range:
 •  Standard and precision 6-1,000V
 •  High-precision preregulated: 12-400V
•  Amperage Range:
 •  Standard: 50-3000K
 •  Precision: 2-100A
•  Voltage regulation (line and load):
 •  Standard: 1%
 •  Precision: .05%
 •  High-precision preregulated: .01%
•  Current regulation (line and load):
 •  Standard: 1%
 •  Precision: .5%
•  Ripple VRMS (maximum):
 •  Standard: 1%
 •  Precision: .5%
 •  High-precision preregulated: .005%
•  Response time (typical):
 •  Standard: 200ms*
 •  Precision: 50ms*
 •  High-precision preregulated: 50µs*

*for load steps of 50 to 90% of full load

Standard Features

•  Constant current control
•  Constant voltage control
•  Automatic crossover
•  Regulated voltage
•  Regulated current
•  Soft start
•  Automatic phase selection
•  Built in test (BIT)
•  Ethernet/IP


•  NEMA enclosure types: 1, 3R, 12, 4, 4X
•  Operating temperature: -5°C to 40°C
•  Storage temperature: -10°C to 65°C
•  Humidity: up to 90% non-condensing


•  Overcurrent/overload*
•  Overvoltage*
•  Undervoltage*
•  Overtemperature (cabinet, semiconductor, transformer)
•  Input short circuit (circuit breaker or fusing)
•  Output short circuit*
•  Input & output surge supression (MOVs)
•  Phase loss*
•  I2t fusing

*via electronic circuitry

Remote Capability / Computer Interface

•  Analog signals: 4-20mA, 0-5V, 0-10V
•  Computer interface: Ethernet/IP, Modbus TCP, SNMP, CANbus, IEEE 488.2 / GPIB, RS232, RS485
•  Functions: start/stop, reset, fault, current adjust, voltage adjust, fault indication

Standard Front Panel Devices

•  Output current adjustment
•  Output voltage adjustment
•  Analog or digital voltmeter
•  Analog or digital ammeter
•  Power on indicator
•  Start/stop pushbutton
•  Fault/reset pushbutton

DSP Control Technology

•  Increased performance
•  One programmable chip with the functionality of conventional control components such as PLCs, microcontrollers, computer interfaces, and printed circuit boards used for equipment control functions, diagnostics, and communications
•  SCR preregulator to achieve high efficiency, low ripple, precise regulation, and low output noise
•  Coarse and fine adjustments are available for both current and voltage
•  Optional communication via Ethernet
•  IGBT-based design to achieve fast response and lower input harmonic current

Codes and Standards

•  IEC
•  NEC


•  Electronic phase imbalance
•  Instrumentation/metering
•  Paralleling
•  12, 18, or 24 pulse design
•  Remote control station
•  Input cables
•  Output cables
•  Mobile (casters, wheels, trailer mount)
•  Event and data logging
•  H/UI touch panel

Cooling Systems

•  Forced air
•  Direct water
•  Closed loop water to water heat exchanger
•  Heatpipe
•  Natural convection
•  Water cooled
•  Liquid cooled
•  Water system protection: low flow, temperature, resistivity, leak detection, low level